Constant-surface-speed taleing machine



Y 1,627,353 May 1927 G. M. THOMAS CONSTANT SURFACE .SPEED TALKING MACHINE Filed Jan. 11, 1926 Patented May 3, 1927.

[UNITED e RGE meme, 0: rmmnt tel te hfiltl fiithvhll-r ce et w-seere n-se en rene emmeel t jen ee a een 26- e fiet e $9 47 My invention, generally stated, relates to ta ki g ma hin and ha e m re esp ial re ien o e new, o stant urface, epe d'me hanism for operating the turntable and rec o d, s wil be h r afte e p ait e h y r r-d having e'u fetm' ngth f S un we've will have mrer ed thereto h in i l w spe d t the Out r d f he e z h or s-tame n' (l0). l e o tiene P min t and which record ill gradually have its pe n reas d to appr x mately s yeig (7 rev luti ns em nute, rehy p 'f e eh int et ihe the en th f. nitrite surface 'over present types of constant ihvo lutiqn perwlninute records, which is one obje t e he Pr en v nt on AnQ h Qhi et cons s in the P o io o a nov l nstnicti h if e, ewing h 2 flee ing arm, a turntable and its sp ndle carried her y a s a ionary tene e m he ing it o n he an s yle apa le. Qt v ica th ement, and a electri ally iv n f i tion roll eent i with he turntab at. a m n helew" aid t he- Still another object consists in the pro; vision of a novel turntable actnating'inechen h f he c a a t r eheve des r bed he einh w in arm eee a t t he operating an electric switch for startin and stepp g the mo or at the p oper per o s- 'etiill fur h bieet f my prese tinv h e n ete i 'th'e n e ie n Qt h vel deta s of e e uetien, rra ment an mhi e o f parts for atta n ng the resu t y he f gei sehi et, I The invention consists. (if the novel contruction e na ter de r bed and nal y eleime lv i a T The nature, characteristic features and scope of the invention will he more fully unde st d r m e fel wi .tt ee ptieh take in nneet en with-"the ccompany n r gs f m ng par h re f, and. n" w ich ig re rep ese ts a f agm ntary iew in plan of a talking machine construct-ion em odying my venti n.

F ure 2, r p se t e eis et en taken upon the line 2 72 of Fignre 1.

Fi ure r pre en s a ew n eee i ekeh'up h the ne 3 3. t F re Fi u e repr sents a} iew i eeetien ke h e e ine t Fig re 1,, sherfih he d iv n m han m in e t d Peeit eht nd i T Figare 5, represents a plan view of the swinging or floating arm in detached posi'- tion."

" For the purpose of illustrating my invention I have shown in the' accompanying drawings one form thereof which is at present preferred by me, since the same has been found in practice to'give satisfactory and reliable results, although it is to be understood that the various instrumentalities of; which my invention consists can be variously arranged and organized and that invention not limited to the precise arrangement and organization of the instrumentalities as herein'shovvn and described. 7

Referring to the drawings in detail, the reference numeral, 1 designates a onve tional turntable such as is employed upon al ng achin new in ne a he m l pre rab y f a um um 0 her ig m er h en bein m u e 11 0. e Sw gin or fl et ne ar 2. S h, fer n nce, es i he h i gure 5: Th arm 2 h th rr e he turntable 1 ie riveel y mounted at i rear end so as to be capable of both vertical and lat r l mo em nt-L Th n a le i jp ed 'hyen e tric mo e eilee Fi 3) h v ng a e 't, pr itl d'w h ew m seer for d ing a orm Whe l 7 mounted on the shaft 8, which isarranged'at right angles to shaft 5,, said 8 having located ther on a $1 11 s a 9 in m sh With heth ep i g er .0- The Spu gea 1 i i me ntd eh th theft ll; w i h i p el t Sha t n ertie th ftie e ler 2, Which latter is in contact With the bottom Qf th e tnrntabhg 1, for rotating the latter.

The friction roller 12 is mounted directly en a h t shif d hex ne dl 13 T e S un hex 14 e; ni etallr m u P9 a t t ary tone arm 15 havin the goose neclrlt}. The'turntable 1 has tile lower portion of its er i al eP- h h l unt d i eh t h 1 9. he i ge'l h s tle by he upp r d lower portions of-the floating arnii, which lette he 'ite fetwe d "por e fie te l' tr w rd y and p n eugh h t 1 Of t the meter hea d 20, he forward e m na hating e fihge ieee 2 ar ang d. for te emeh me hip le i n ett e et' an s t juncts, so that the same may be nanually moved i em h p s eh ee ih dette 'i in F gure 1,, 9 th p e t e ehewh hr 13111 11 .1 The t m ,2 it m ved 1 are di e en by the action of the needle of the sound box in the spiral grooves of the record and 1s returned to its original and supporting position by hand subsequent to the lifting of the sound box. The rear end of the floating arm 2 is pivotally mounted on the pin 22, which is carried by the block 28, having the rear vertical hole 24 therein. The block 23 is seated in a recess 25 in the bracket 26, in which is the vertically disposed pin 27, which passes through the hole 24 in the block 23. It will thus be seen that the arm 2 is capable of movement vertically in an arc of a circle upon the pin 22, and its proper position is assured by the adjusting screw 28, seen in Figures 2 and 5. The arm 2 and the rear block 23 move laterally, in an arc of a circle as a unit, upon the vertical pivot pin 27, and the extent of such lateral move ment is limited by the opposed adjusting screws 29, seen in Figures 1 and 2. Adjacent the rear portion of the arm 2 there is provided a pendant post 30, which alternately contacts with the opposed arms 31 and 32 of the electric switch 33, which may be of any conventional type. The records 34 are made with an accurately located center hole, having a bushing therein, if necessary. 35 designates a suitable switch for throwing off the electric current, when the machine is not in use. It is believed that from the foregoing detailed description, the operation of my novel talking machine structure will be readily understood. However, it may be stated that according to my present invention, with the motor 4 operating, the disc record 34 is revolved first at low speed, say ten revolutions per minute which speed is gradually increased to say seventy-eight revolutions per minute and during such operation several times the amount of playing surface of the record 34 is afforded over conventional types of.talking machines with a constant, uniform rate of speed revolution. Also the novel feature of electric switch for starting the motor and stopping the same forms an important point in the operation. particularly since an initial adjustment of said switch serves to cause stoppage of all records, at approximately the same position. The adjustment of the electric switch is secured by suitable adjustment of set screws in the hubs of each of the switch arms. Another feature in the operation is that when desired the floating arm 2 may be lifted vertically around its pivot point the advantages of which are apparent. The oper ation of the rotating disc laterally with respect to the stationary tone tube also forms a novel feature and in so far as I am advised comprises a new movement in talking machine operation.

It will now be apparent that I have devised a novel and useful construction of constant surface speed talking machine which embodies the features of advantage enumerated as desirable in the statement of the invention and the above description and while I have in the present instance shown and described the preferred embodiment thereof which has been found in practice to give satisfactory and reliable results, it is to be understood that the same is susceptible of modification in various particulars without departing from the spirit or .scope of the invention or sacrificing any of its advantages.

Having thus described my invention what I claim as new and desire to secure by Letters Patent, is

1. In a device of the character stated, a fixed tone arm including its sound box and needle, a laterally movable arm, a turntable rotatably mounted with respect thereto and movable laterally therewith, an electrical motor, friction means for driving said turntable, electrically operated means for driving said friction means, and electrically operated means for stopping rotation of said motor.

2. In a device of the character stated, a fixed tone arm including its sound box and needle, a laterally movable arm pivot-ally mounted so as to move vertically in an arc of a circle, a turntable rotatably mounted with respect thereto and movable laterally therewith, friction means for driving said turntable an electrical motor, electrically operated means for driving said friction means, and electrically operated means for stopping rotation of said motor.

3. In a device of the character stated, a fixed tone arm including its sound box and needle, a laterally movable arm, a turntable rotatably mounted with respect thereto and movable laterally therewith, friction means for driving said turntable, electrically operated means including a motor and a train of gear wheels for driving said friction means, and electrically operated means for stopping rotation of said motor.

4. In a device of the character stated, a fixed tone arm including its sound box and needle, a laterally movable arm, a turntable rotatably mounted upon ball bearings with respect thereto and movable laterally therewith, an electrical motor, friction means for driving said turntable, electrically ope 'ated means for driving said friction means, and electrically operated means for stopping rotation of said motor.

5. In a device of the character stated, a fixed tone arm including its sound box and needle, a laterally movable arm, a turntable rotatably mount-ed with respect thereto and movable laterally therewith, an electrical motor friction means for driving said turntable, electrically operated means for drive ing said friction means, and electrically operated means including an electric switch having a fixed arm in the path of travel of said movable arm for stopping rotation of said motor.

6. In a device of the character stated, a fixed tone arm including its sound box and needle, a laterally movable arm, a turntable rotatably mounted with respect thereto and movable laterally therewith, an electrical motor, friction means for driving said turntable, electrically operated means for driving said friction means, and electrically operated means for stopping rotation of said motor, and a motor board having a slot therein through which slot said movable arm has movement. p

In testimony whereof I have signed my name.

GEORGE M. THOMAS. 

